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Preparation method of ozone catalytic decomposition catalyst using expandable graphite as carrier

A technology of expanded graphite and catalytic decomposition, which is applied in the direction of catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc., which can solve the problem of catalyst performance carrier being greatly affected and environmental hazards in the preparation process large, unstable catalyst activity, etc., to achieve the effect of abundant active sites, excellent adsorption performance, and improved disposal efficiency

Active Publication Date: 2018-03-02
秦皇岛晟创科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are also some technical defects in the supported composite catalyst. For example, the performance of the catalyst is greatly affected by the carrier, the morphology, structure, composition and dispersion of the carrier are different, and the thermal stability and catalytic performance of the catalyst will be quite different; The active components and their distribution on the carrier and the existing form also have a significant impact on the performance of the catalyst; the catalyst activity is unstable, and the preparation process is harmful to the environment; the metal oxide on the catalyst surface will be lost due to leaching in the solution; in addition, in The carrier supports Ag, Au and Pt precious metals to prepare composite catalysts, which can improve the catalytic activity of the catalyst, but the catalyst preparation cost is too high, and basically has no engineering practical value

Method used

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  • Preparation method of ozone catalytic decomposition catalyst using expandable graphite as carrier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Preparation of expanded graphite carrier loaded with cerium active components:

[0037] First, the ozone pre-oxidation treatment of flake graphite: 150g deionized water is added into a beaker with a volume of 500mL, and the beaker filled with deionized water is placed on a multifunctional stirrer, and then 100g of flakes with a particle size of 80 mesh Add graphite into the beaker and turn on the stirring control switch of the stirrer; then insert the gas generating tube of the ozone generator into the bottom of the beaker, turn on the power switch of the ozone generator, the gas source used by the ozone generator is pure oxygen, and the gas generating tube is passed into the solution The amount of ozone is 5mg / L, and the flake graphite is subjected to ozonation at room temperature for 20min; Flake graphite was dried at 80°C for 8 hours;

[0038] Carry out chemical oxidation intercalation treatment to flake graphite next: first 25g mass concentration is that 70% pe...

Embodiment 2

[0051] (1) Preparation of expanded graphite carrier loaded with cerium active components:

[0052] First, the ozone pre-oxidation treatment of flake graphite: first add 150g of deionized water into a beaker with a volume of 500mL, and place the beaker containing deionized water on a multifunctional stirrer, and then put 100g of deionized water with a particle size of 80 mesh Add flake graphite into the beaker and turn on the stirring control switch of the agitator; then insert the gas generating tube of the ozone generator into the bottom of the beaker and turn on the power switch of the ozone generator. The gas source used by the ozone generator is pure oxygen, which is passed into the The amount of ozone in the solution was 5 mg / L, and the flake graphite was subjected to ozonation at room temperature for 24 minutes; after the ozone oxidation was completed, the solution was filtered to collect the flake graphite powder, and then the flake graphite was washed with deionized wat...

Embodiment 3

[0065] (1) Preparation of expanded graphite carrier loaded with cerium active components:

[0066] First, the ozone pre-oxidation treatment of flake graphite: first add 150g of deionized water into a beaker with a volume of 500mL, and place the beaker containing deionized water on a multifunctional stirrer, and then put 100g of deionized water with a particle size of 80 mesh Add flake graphite into the beaker and turn on the stirring control switch of the agitator; then insert the gas generating tube of the ozone generator into the bottom of the beaker and turn on the power switch of the ozone generator. The gas source used by the ozone generator is pure oxygen, which is passed into the The amount of ozone in the solution was 5 mg / L, and the flake graphite was subjected to ozonation at room temperature for 27 minutes; after the ozone oxidation was completed, the solution was filtered to collect the flake graphite powder, and then the flake graphite was washed with deionized wat...

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Abstract

The invention provides a preparation method of an ozone catalytic decomposition catalyst using expandable graphite as a carrier. The method comprises the following steps: sequentially carrying out ozone oxidation, chemical oxidation intercalation, diethylenetriamine amination and cerium ion impregnation loading treatment on flake graphite, and then carrying out microwave expanding treatment to obtain active component cerium supported expanded graphite; and carrying out impregnating treatment, manganese ion loading treatment and high temperature sintering treatment on the prepared expanded graphite to prepare the catalyst adopting the expanded graphite as the carrier and loaded with active components cerium and manganese. The prepared catalyst can highly-efficiently catalyze ozone to generate hydroxy free radicals in order to realize excellent removal of non-degradable highly-toxic organic pollutants in the water environment, so the catalyst has an expected application prospect in the field of wastewater pollution treatment.

Description

technical field [0001] The invention relates to a preparation method of a catalyst. Background technique [0002] With the rapid development of the industrial and agricultural economy, the types of organic pollutants discharged into the water environment such as pesticides, herbicides, antibiotics, and dyes are becoming more and more complicated, and their concentration is also increasing. These organic substances are usually not easy to biodegrade and are easy to It accumulates in organisms and has carcinogenic and mutagenic effects, which has seriously affected the safety of aquatic biological systems, and also brought great challenges to the safety of urban water supply and human health. Therefore, the research and development of new processes and technologies for the economical and efficient removal of refractory organic pollutants in water bodies has become the top priority of the current water pollution prevention and control work. The main technologies used to remove...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34C02F1/72C02F1/78
CPCC02F1/725C02F1/78B01J23/34B01J37/0207B01J37/0213B01J37/346C02F2305/023B01J35/60
Inventor 宋来洲霍思月张志辉贺君王伟邢丽飞
Owner 秦皇岛晟创科技有限公司
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